Gemstone Caverns - Borderless (Foil) (EOS) from Edge of Eternities: Stellar Sights, available at 401 Games Canada.

• Rarity: Mythic Rare
• Finish: Foil
• Artist: Mark Poole
• Card Text:
  If this card is in your opening hand and you're not the starting player, you may begin the game with Gemstone Caverns on the battlefield with a luck counter on it. If you do, exile a card from your hand.
  T: Add C. If Gemstone Caverns has a luck counter on it, instead add one mana of any color.